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lib.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Helper functions
*
* @package block
* @subpackage coursefeedback
* @copyright 2011-2014 onwards Jan Eberhardt (@ innoCampus, TU Berlin)
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined("MOODLE_INTERNAL") || die();
define("COURSEFEEDBACK_DEFAULT", "DEFAULT");
define("COURSEFEEDBACK_ALL", "ALL");
define("COURSEFEEDBACK_EMPTY_ACTIVE", 0);
/**
* Fixes holes in question id order.
*
* @param int $feedbackid
* @param bool $checkonly don"t change database entries
* @return 0 if operation failed or order is incorrect (checkonly), 1 if order is correct and 2 if order has succesful been changed
*/
function block_coursefeedback_order_questions($feedbackid, $checkonly = true)
{
global $CFG, $DB;
$feedbackid = intval($feedbackid);
$max = block_coursefeedback_get_questionid($feedbackid) - 1;
$currentid = 1;
$sql = array();
if ($max > 0)
{
while ($currentid < $max)
{
if (!$DB->record_exists("block_coursefeedback_questns",
array("coursefeedbackid" => $feedbackid, "questionid" => $currentid)))
{
while (!$DB->record_exists("block_coursefeedback_questns",
array("coursefeedbackid" => $feedbackid, "questionid" => $max)) &&
$max > 0)
{
// Don"t use other spots.
$max--;
}
$sql[] = array("query" => "UPDATE {block_coursefeedback_questns}
SET questionid = :currentid,timemodified = :modified
WHERE coursefeedbackid = :fid
AND questionid = :max",
"params" => array("currentid" => $currentid,
"modified" => time(),
"fid" => $feedbackid,
"max" => $max));
$max--;
}
$currentid++;
}
if (empty($sql))
return 1;
else if (!$checkonly)
{
if (block_coursefeedback_execute_sql_arr($sql))
return 2;
else
return 0;
}
}
}
/**
* If the function returns a negative number, it indicates a false validation (i.e. use of blacklisted characters).
*
* @param string $feedbackname
* @param bool $returnid Should the id of the newly created record entry be returned?
* @return int|bool - record id or false on failure.
*/
function block_coursefeedback_insert_feedback($feedbackname, $returnid = true)
{
global $DB;
if (strpos($feedbackname, ";") === false)
{
$record = new stdClass();
$record->name = block_coursefeedback_clean_sql($feedbackname);
$record->timemodified = time();
return $DB->insert_record("block_coursefeedback", $record, $returnid);
}
else return -1;
}
/**
* If the return is a negative number, it indicates a false validation (i.e. use of blacklisted characters).
*
* @param int $feedbackid
* @param string $feedbackname
* @return int|bool - Success of operation.
*/
function block_coursefeedback_rename_feedback($feedbackid, $feedbackname)
{
global $DB;
if (strpos($feedbackname, ";"))
return -1;
if ($record = $DB->get_record("block_coursefeedback", array("id" => $feedbackid)))
{
$record->name = block_coursefeedback_clean_sql($feedbackname);
$record->timemodified = time();
return clean_param($DB->update_record("block_coursefeedback", $record), PARAM_BOOL);
}
else return false;
}
/**
* If the function returns a negative number, it indicates a false validation (i.e. use of blacklisted characters).
*
* @param int $feedbackid
* @return bool - Success of operation or false, if feedback with specified ID doesn"t exist.
*/
function block_coursefeedback_copy_feedback($feedbackid, $name)
{
global $DB;
$feedbackid = clean_param($feedbackid, PARAM_INT);
$newid = block_coursefeedback_insert_feedback($name);
if ($newid === -1)
return -1;
else if ($newid > 0 && $questions = $DB->get_records("block_coursefeedback_questns", array("coursefeedbackid" => $feedbackid)))
{
$a = true;
foreach ($questions as $question)
{
if (!block_coursefeedback_insert_question($question->question, $newid, $question->questionid, $question->language))
{
// If one fails the whole operation fails.
$a = false;
break;
}
}
$b = block_coursefeedback_rename_feedback($newid, $name);
return $a && $b;
}
else return true;
}
/**
* @param int $feedbackid
* @return bool Success of operation.
*/
function block_coursefeedback_delete_feedback($feedbackid)
{
global $DB;
if ($DB->delete_records("block_coursefeedback_answers", array("coursefeedbackid" => $feedbackid)) &&
$DB->delete_records("block_coursefeedback_questns", array("coursefeedbackid" => $feedbackid)) &&
$DB->delete_records("block_coursefeedback", array("id" => $feedbackid)))
{
// If the first fails, the second won't be executed (because of &&).
return true;
}
else
{
// If one fails, the whole operation fails.
return false;
}
}
/**
* @param string $question
* @param int $feedbackid
* @param int $questionid
* @param string $language
* @param bool $returnid Return the id of the newly created record? If false, a boolean is returned.
* @return bool|int
*/
function block_coursefeedback_insert_question($question, $feedbackid, $questionid, $language, $returnid = true)
{
global $DB;
$feedbackid = intval($feedbackid);
$questionid = intval($questionid);
$language = preg_replace("/[^a-z\_]/", "", strtolower($language));
if (!$DB->record_exists("block_coursefeedback_questns",
array("coursefeedbackid" => $feedbackid, "questionid" => $questionid, "language" => $language)))
{
$languages = block_coursefeedback_get_implemented_languages($feedbackid, $questionid, true, true);
if ($languages && in_array($language, $languages)) // cCeck if language already exists.
{
$record = new stdClass();
$record->question = block_coursefeedback_clean_sql($question);
$record->coursefeedbackid = $feedbackid;
$record->questionid = $questionid;
$record->language = $language;
$record->timemodified = time();
return $DB->insert_record("block_coursefeedback_questns", $record);
}
}
return false;
}
/**
* @param int $feedbackid
* @param int $oldpos
* @param int $newpos
* @return bool Success of operation
*/
function block_coursefeedback_swap_questions($feedbackid, $oldpos, $newpos)
{
global $DB;
$feedbackid = intval($feedbackid);
$oldpos = intval($oldpos);
$newpos = intval($newpos);
$tmppos = block_coursefeedback_get_questionid($feedbackid);
if ($DB->record_exists("block_coursefeedback_questns", array("coursefeedbackid" => $feedbackid, "questionid" => $oldpos)) &&
$DB->record_exists("block_coursefeedback_questns", array("coursefeedbackid" => $feedbackid, "questionid" => $newpos)))
{
$sql = array();
// Set temporary position.
$sql[] = array(
"query" => "UPDATE {block_coursefeedback_questns}
SET questionid = :tmppos
WHERE coursefeedbackid = :feedbackid
AND questionid = :newpos",
"params" => array(
"tmppos" => $tmppos,
"feedbackid" => $feedbackid,
"newpos" => $newpos
)
);
// Move to new position.
$sql[] = array(
"query" => "UPDATE {block_coursefeedback_questns}
SET questionid = :newpos, timemodified = :modified
WHERE coursefeedbackid = :fid
AND questionid = :oldpos",
"params" => array(
"newpos" => $newpos,
"modified" => time(),
"fid" => $feedbackid,
"oldpos" => $oldpos
)
);
// Restore old position.
$sql[] = array(
"query" => "UPDATE {block_coursefeedback_questns}
SET questionid = :oldpos, timemodified = :modified
WHERE coursefeedbackid = :fid
AND questionid = :tmppos",
"params" => array(
"oldpos" => $oldpos,
"modified" => time(),
"fid" => $feedbackid,
"tmppos" => $tmppos
)
);
return block_coursefeedback_execute_sql_arr($sql);
}
else
return false;
}
/**
* @param int $feedbackid
* @param int $questionid
* @param string $question
* @param string $language
* @param bool $deleteanswers
* @return bool Success of operation
*/
function block_coursefeedback_update_question($feedbackid, $questionid, $question, $language)
{
global $DB;
$feedbackid = intval($feedbackid);
$questionid = intval($questionid);
if (in_array($language, block_coursefeedback_get_implemented_languages($feedbackid, $questionid)))
{
$record = $DB->get_record("block_coursefeedback_questns", array("coursefeedbackid" => $feedbackid,
"questionid" => $questionid,
"language" => $language));
$record->question = block_coursefeedback_clean_sql($question);
$record->timemodified = time();
return clean_param($DB->update_record("block_coursefeedback_questns", $record), PARAM_BOOL);
}
return false;
}
/**
*
* @param int $feedbackid
* @param int $questionid
* @param String|COURSEFEEDBACK_ALL $language (default is all languages)
* @return bool Success of operation
*/
function block_coursefeedback_delete_question($feedbackid, $questionid, $language = COURSEFEEDBACK_ALL)
{
global $DB;
$feedbackid = intval($feedbackid);
$questionid = intval($questionid);
if ($language == COURSEFEEDBACK_ALL)
{
$success = $DB->delete_records("block_coursefeedback_questns", array("coursefeedbackid" => $feedbackid,
"questionid" => $questionid));
}
else if (array_key_exists($language, get_string_manager()->get_list_of_translations()))
{
$success = $DB->delete_records("block_coursefeedback_questns", array("coursefeedbackid" => $feedbackid,
"questionid" => $questionid,
"language" => $language));
}
else
$success = false;
$success = clean_param($success, PARAM_BOOL);
if ($success)
block_coursefeedback_order_questions($feedbackid, false);
return $success;
}
/**
* @param int $feedbackid
* @param array|string $language Array of language codes or language code
* @return int|bool - number of deleted records or false on fail
*/
function block_coursefeedback_delete_questions($feedbackid, $languages)
{
global $DB;
$feedbackid = intval($feedbackid);
if (!is_array($languages))
$languages = array($languages); // Ensure array.
$implemented = block_coursefeedback_get_implemented_languages($feedbackid);
$conditions = array("coursefeedbackid" => $feedbackid);
$succeeded = 0;
foreach ($languages as $langcode)
{
$conditions["language"] = $langcode;
if (in_array($langcode, $implemented) &&
$DB->delete_records("block_coursefeedback_questns", $conditions))
{
$succeeded++;
}
}
if ($succeeded > 0)
block_coursefeedback_order_questions($feedbackid);
return $succeeded;
}
/**
* @param int $feedbackid
* @param int $questionid Leave blank for all responses of the specified feedback
* @return bool Succes of operation
*/
function block_coursefeedback_delete_answers($feedbackid, $questionid = null)
{
global $DB;
$conditions = array("coursefeedbackid" => intval($feedbackid));
if (is_int($questionid))
$conditions["questionid"] = $questionid;
return clean_param($DB->delete_records("block_coursefeedback_answers", $conditions), PARAM_BOOL);
}
/**
* Get all language codes for which questions are well-defined (question in default language exists)
*
* @param int $feedbackid | COURSEFEEDBACK_DEFAULT
* @param bool $codesonly
* @return array Language codes
*/
function block_coursefeedback_get_combined_languages($feedbackid = COURSEFEEDBACK_DEFAULT, $codesonly = true) {
global $CFG, $DB;
// Clean params.
if ($feedbackid === COURSEFEEDBACK_DEFAULT) {
$feedbackid = get_config("block_coursefeedback", "active_feedback");
} else {
$feedbackid = intval($feedbackid);
}
$codesonly = clean_param($codesonly, PARAM_BOOL);
$count = block_coursefeedback_get_questionid($feedbackid) - 1;
$select = "coursefeedbackid = :fid GROUP BY language HAVING COUNT(language) = :count";
$params = array("fid" => $feedbackid, "count" => $count);
$langs = $DB->get_records_select("block_coursefeedback_questns", $select, $params, "", "language");
$langs = array_keys($langs);
if ($langs && !$codesonly) {
$listoflanguages = get_string_manager()->get_list_of_translations();
$languages = array();
foreach ($langs as $langcode) {
$languages[$langcode] = isset($listoflanguages[$langcode])
? $listoflanguages[$langcode]
: get_string("adminpage_html_notinstalled", "block_coursefeedback", $langcode);
}
$langs = $languages;
}
return ($langs ? $langs : array());
}
/**
* @param int $feedbackid
* @param int $questionid
* @param bool $codesonly
* @param bool $inverted
* @return array - All languages of the feedback, which are listed in database. Array data type depends on input parameters.
*/
function block_coursefeedback_get_implemented_languages($feedbackid, $questionid = null, $langcodesonly = true, $inverted = false)
{
global $CFG, $DB;
$feedbackid = intval($feedbackid);
$sql = "SELECT language FROM {block_coursefeedback_questns} WHERE coursefeedbackid = :fid ";
if (is_int($questionid) && $questionid > 0)
$sql .= "AND questionid = :qid ";
$sql .= "GROUP BY language";
$implemented = $DB->get_fieldset_sql($sql, array("fid" => $feedbackid, "qid" => $questionid));
if (!$implemented)
$implemented = array();
$installed = get_string_manager()->get_list_of_translations();
if ($langcodesonly)
{
$languages = ($inverted)
? array_diff(array_keys($installed), $implemented)
: $implemented;
}
else if ($inverted) // Case !$langcodesonly && $inverted.
{
foreach ($implemented as $i)
unset($installed[$i]);
$languages = $installed;
}
else // Case !$langcodesonly && !$inverted.
{
$languages = array();
foreach ($implemented as $i)
$languages[$i] = $installed[$i];
}
return $languages;
}
/**
* @param int $feedbackid
* @return int - Next availble question id number.
*/
function block_coursefeedback_get_questionid($feedbackid)
{
global $DB;
$feedbackid = intval($feedbackid);
$n = $DB->get_field("block_coursefeedback_questns", "MAX(questionid)", array("coursefeedbackid" => $feedbackid));
return $n ? ($n + 1) : 1;
}
/**
* @param int $feedbackid - If no record is found or if left blank "untitled" will be returned.
* @return string - Feedback name.
*/
function block_coursefeedback_get_feedbackname($feedbackid = null)
{
global $DB;
if (is_number($feedbackid))
$name = $DB->get_field("block_coursefeedback", "name", array("id" => $feedbackid));
if (empty($name))
$name = get_string("untitled", "block_coursefeedback");
return htmlentities($name);
}
/**
* @param int $courseid
* @param string $sort
* @return array - 2-dimensional array of answers, ordered by question id
*/
function block_coursefeedback_get_answers($course, $sort = "questionid")
{
global $DB, $CFG, $USER;
$config = get_config("block_coursefeedback");
$answers = array();
$course = clean_param($course, PARAM_INT);
if ($course <= 0)
throw new moodle_exception("invalidcourseid");
$questions = block_coursefeedback_get_questions($config->active_feedback, $config->default_language);
$params = array("fid" => $config->active_feedback, "course" => $course);
if ($questions)
{
$count = count($questions);
foreach (array_keys($questions) as $question)
{
$params["qid"] = $question;
$sql = "SELECT
answer,COUNT(*) AS count
FROM
{block_coursefeedback_answers}
WHERE
coursefeedbackid = :fid AND
questionid = :qid AND
course = :course
GROUP BY
answer";
if ($results = $DB->get_records_sql($sql, $params))
{
$answers[$question] = array();
foreach ($results as $answer)
$answers[$question][$answer->answer] = $answer->count;
block_coursefeedback_array_fill_spaces($answers[$question], 0, 7, 0);
}
else
$answers[$question] = array_fill(0, 7, 0);
}
block_coursefeedback_array_fill_spaces($answers, 1, $count, array_fill(0, 7, 0));
}
return $answers;
}
/**
* @param int $coursfeedback_id - Feedback Id of questions to be shown
* @param array $languages - array of language codes (sorted by priority)
* @return array - Returns an array of strings (should be questions) or false, if table is empty
*/
function block_coursefeedback_get_questions_by_language($feedbackid,
$languages,
$sort = "questionid",
$fields = "questionid AS id,question")
{
global $DB;
$feedbackid = intval($feedbackid);
if (!is_array($languages))
$languages = array($languages);
$languages[] = get_config("block_coursefeedback", "active_feedback"); // Ensures, that intersection isn"t empty.
$fblanguages = block_coursefeedback_get_combined_languages($feedbackid);
if ($fblanguages && $language = current(array_intersect($languages, $fblanguages)))
{
$questions = $DB->get_records("block_coursefeedback_questns",
array("coursefeedbackid" => $feedbackid, "language" => $language),
$sort,
$fields);
}
else
$questions = false;
return $questions;
}
/**
* @param string $feedbackid
* @return multitype:
*/
function block_coursefeedback_get_question_ids($feedbackid = COURSEFEEDBACK_DEFAULT)
{
global $DB;
if ($feedbackid === COURSEFEEDBACK_DEFAULT)
$feedbackid = get_config("block_coursefeedback", "default_language");
$feedbackid = intval($feedbackid);
$select = "coursefeedbackid = ? GROUP BY questionid ORDER BY questionid";
return $DB->get_fieldset_select("block_coursefeedback_questns", "questionid", $select, array($feedbackid));
}
/**
* @param int|COURSEFEEDBACK_DEFAULT $feedbackid (default is currently activated feedback)
* @param string|COURSEFEEDBACK_DEFAULT $language - Language code (default is currently default language)
* @return array - Returns an array of questions or false
*/
function block_coursefeedback_get_questions($feedbackid = COURSEFEEDBACK_DEFAULT, $language = COURSEFEEDBACK_DEFAULT)
{
global $DB;
$res = array();
$params = array();
if ($feedbackid === COURSEFEEDBACK_DEFAULT) {
$feedbackid = get_config("block_coursefeedback", "active_feedback");
}
if ($language === COURSEFEEDBACK_DEFAULT)
$language = get_config("block_coursefeedback", "default_language");
$params["coursefeedbackid"] = intval($feedbackid);
$params["language"] = preg_replace("/[^a-z]/", "", $language);
if ($records = $DB->get_records("block_coursefeedback_questns", $params, "questionid ASC", "questionid,question"))
{
foreach ($records as $record)
$res[$record->questionid] = $record->question;
}
return empty($res) ? false : $res;
}
/**
* @param int $feedbackid
* @param bool $return
* @return array - Array of strings with error messages if editing is not allowed (may be empty).
*/
function block_coursefeedback_get_editerrors($feedbackid)
{
global $DB;
$feedbackid = intval($feedbackid);
$perm = array();
if ($feedbackid == get_config("block_coursefeedback", "active_feedback"))
$perm["erroractive"] = get_string("perm_html_erroractive", "block_coursefeedback");
if ($DB->record_exists("block_coursefeedback_answers", array("coursefeedbackid" => $feedbackid)))
$perm["answersexists"] = get_string("perm_html_answersexists", "block_coursefeedback");
return $perm;
}
/**
* @param int $feedbackid
* @return bool - false, if specified feedback doesn"t exists
*/
function block_coursefeedback_set_active($feedbackid)
{
global $DB;
if ($feedbackid == 0 || $DB->record_exists("block_coursefeedback", array("id" => $feedbackid)))
{
set_config("active_feedback", $feedbackid, "block_coursefeedback");
return true;
}
else
return false;
}
/**
* Prints standard header for coursefeedback question administration
*
* @param bool $editable
* @param int|NULL $feedbackid
*/
function block_coursefeedback_print_header($editable = false, $feedbackid = null)
{
global $CFG, $OUTPUT;
$editable = clean_param($editable, PARAM_BOOL);
$div = html_writer::start_tag("div", array("style" => "margin-left:3em;margin-bottom:1em;"));
if ($editable)
{
$url1 = block_coursefeedback_adminurl("questions", "new", $feedbackid);
$url2 = block_coursefeedback_adminurl("questions", "dlang", $feedbackid);
$div .= html_writer::link($url1, get_string("page_link_newquestion", "block_coursefeedback")) . "<br/>"
. html_writer::link($url2, get_string("page_link_deletelanguage", "block_coursefeedback")) . "<br/>";
}
$url1 = block_coursefeedback_adminurl("feedback", "view");
$url2 = new moodle_url("/" . $CFG->admin . "/settings.php", array("section" => "blocksettingcoursefeedback"));
$div .= html_writer::link($url1, get_string("page_link_backtofeedbackview", "block_coursefeedback")) . "<br/>"
. html_writer::link($url2, get_string("page_link_backtoconfig", "block_coursefeedback")) . "<br/>"
. html_writer::end_div();
echo $OUTPUT->box($div);
if (is_int($feedbackid))
{
$notes = block_coursefeedback_validate($feedbackid, true);
if (!empty($notes)) {
$p = html_writer::tag("p", get_string("page_html_intronotifications", "block_coursefeedback"));
echo $OUTPUT->notification($p . html_writer::alist($notes));
}
}
}
/**
* Prints notification box for coursefeedback question administration.
*
* @param array $errors
* @param int $feedbackid
*/
function block_coursefeedback_print_noperm_page($errors, $feedbackid)
{
global $OUTPUT;
$html = html_writer::tag("h4",
get_string("perm_header_editnotpermitted", "block_coursefeedback"),
array("style" => "text-align:center;"))
. html_writer::alist($errors,
array("style" => "margin-left:3em;margin-right:3em;"));
if (isset($errors["answersexists"]))
{
$html .= html_writer::tag("p",
get_string("perm_html_danswerslink", "block_coursefeedback", $feedbackid),
array("style" => "margin-left:3em;margin-right:3em;"));
}
else if (isset($errors["erroractive"]))
{
$html .= html_writer::tag("p",
get_string("perm_html_duplicatelink", "block_coursefeedback", $feedbackid),
array("style" => "margin-left:3em;margin-right:3em;"));
}
echo $OUTPUT->box($html);
}
/**
* @param int $feedbackid
* @param string $value - Displayed text
*/
function block_coursefeedback_create_activate_button($feedbackid, $value = "")
{
if (!is_string($value) or $value === "")
$value = get_string("page_link_use", "block_coursefeedback");
$url = block_coursefeedback_adminurl("feedback", "activate", $feedbackid);
return html_writer::link($url, $value);
}
/**
* Only alias for now.
* TODO: Provide space in DB for descriptions in different language and get it here.
*
* @param int $feedbackid - not used for now
*/
function block_coursefeedback_get_description($feedbackid)
{
/*
global $DB, $USER, $COURSE;
$lang = $USER->lang;
$alternatives = array($COURSE->lang, $CFG->lang);
while (!$DB->record_exists("block_coursefeedback",
array("coursefeedbackid" => $feedbackid, "questionid" => 0, "language" => $lang)))
{
$lang = array_shift($alternatives);
}
return $DB->get_field("block_coursefeedback_questns",
"question",
array("coursefeedbackid" => $feedbackid,
"questionid" => 0,
"language" => $lang));
*/
return "";
}
/**
* Reimplementation of the moodle 1.9 execute_sql_arr.
*
* Secrurity WARNING: All statements won't be validated, before they are executed!
*
* @param array<array> $sqlarr Each field is one query, one query contains the query string (key "query") and his parameters (key "params")
* @return boolean
*/
function block_coursefeedback_execute_sql_arr($sqlarr)
{
global $DB;
// Transaction handling; improves db consistancy.
$dbtrans = $DB->start_delegated_transaction();
$success = true;
foreach ($sqlarr as $sql)
{
// Check if for null-pointer warnings before execution.
if (!isset($sql["query"]) || !isset($sql["params"]))
continue;
if (!$DB->execute($sql["query"], $sql["params"]))
{
$success = false;
break;
}
}
if ($success)
$dbtrans->allow_commit();
else
$dbtrans->rollback(new dbtransfer_exception("dbupdatefailed"));
return $success;
}
/**
* Fill missing values of an existing array.
*
* @param array $array
* @param int $start
* @param int $num
* @param mixed $value
*/
function block_coursefeedback_array_fill_spaces(&$array, $start, $num, $value)
{
for($i = $start; $i < $num; $i++)
{
if (!isset($array[$i]))
$array[$i] = $value;
}
ksort($array);
}
/**
* @param mixed $printable
* @param bool Should the execution of the script come to an end?
*/
function block_coursefeedback_debug($printable, $die = false)
{
if (is_bool($printable))
$printable = $printable ? "TRUE" : "FALSE";
$string = "<pre>" . print_r($printable, true) . "</pre>";
if ($die)
die($string);
else
echo $string;
}
/**
* @param array|bool $bools
* @return String a comma-seperated list of "TRUE" or "FALSE"
*/
function block_coursefeedback_check_bools($bools = array())
{
if (!is_array($bools)) $bools = array($bools);
foreach ($bools as &$boolean)
$boolean = $boolean ? "TRUE" : "FALSE";
return join(" ", $bools);
}
/**
* @param string $langcode
* @return string - Gives the human readable language string
*/
function block_coursefeedback_get_language($langcode)
{
$list = get_string_manager()->get_list_of_translations();
$language = (isset($list[$langcode])) ? $list[$langcode] : "[undefined]";
return $language;
}
/**
* Searchs for the proper language code for evaluation.
*
* @return String - Language code
*/
function block_coursefeedback_find_language($lang = null)
{
global $USER, $COURSE, $DB;
$config = get_config("block_coursefeedback");
$langs = block_coursefeedback_get_combined_languages($config->active_feedback);
if ($lang !== null && in_array($lang, $langs))
return $lang;
else if (in_array($USER->lang, $langs))
return $USER->lang;
else if (in_array($COURSE->lang, $langs))
return $COURSE->lang;
else if (in_array($config->default_language))
return $config->default_language;
else
return null; // No questions available.
}
/**
* Checks if there are questions to display for coursefeedback
*
* @param string $feedbackid
* @return boolean
*/
function block_coursefeedback_questions_exist($feedbackid = COURSEFEEDBACK_DEFAULT)
{
global $DB, $CFG, $COURSE, $USER;
$config = get_config("block_coursefeedback");
$feedbackid = ($feedbackid === COURSEFEEDBACK_DEFAULT) ? $config->active_feedback : intval($feedbackid);
$langs = block_coursefeedback_get_combined_languages($feedbackid);
return in_array($USER->lang, $langs) ||
in_array($COURSE->lang, $langs) ||
in_array($CFG->lang, $langs) ||
in_array($config->default_language, $langs);
}
/**
* Checks feedback on useableness
*
* @param int $feedbackid
* @param boolean $returnerrors
* @return multitype:array boolean
*/
function block_coursefeedback_validate($feedbackid, $returnerrors = false)
{
$notifications = array();
$feedbackid = intval($feedbackid);
if ($feedbackid > 0)
{
$langs = block_coursefeedback_get_combined_languages($feedbackid);
if (empty($langs))
$notifications[] = get_string("page_html_norelations", "block_coursefeedback");
$count = block_coursefeedback_get_questionid($feedbackid) - 1;
if ($count !== count(block_coursefeedback_get_questions($feedbackid)))
$notifications[] = get_string("page_html_servedefaultlang",
"block_coursefeedback",
get_config("block_coursefeedback", "default_language"));
}
if ($returnerrors)
return $notifications;
else
return empty($notifications);
}
/**
* Clears string for database import
*
* @param string $text
* @return string
*/
function block_coursefeedback_clean_sql($text)
{
$text = clean_param($text, PARAM_NOTAGS);
return $text;
}
function format($string)
{
return format_text(stripslashes($string), FORMAT_PLAIN);
}
/**
* @param string $mode feedback|question|questions
* @param string $action view|edit|delete
* @param array $other params of the url.
* @return moodle_url to admin.php with given params.
*/
function block_coursefeedback_adminurl($mode, $action, $fid = null, array $other = array())
{
$url = new moodle_url("/blocks/coursefeedback/admin.php");
$params = array_merge($other, array("mode" => $mode, "action" => $action));
if (is_number($fid))
$params["fid"] = $fid;
$url->params($params);
return $url;
}
/**
* Enables/disables a sticky (on all course main pages) instance of this block.
*
* @param boolean $b
* @throws moodle_exception
*/
function block_coursefeedback_set_sticky($b = true)
{
global $DB;
$active = get_config("block_coursefeedback", "activeinstance");
if ($b)
{
if (!block_coursefeedback_is_sticky())
{
$blockinstance = new stdClass();
$blockinstance->blockname = "coursefeedback";
$blockinstance->parentcontextid = 1;
$blockinstance->showinsubcontexts = 1;
$blockinstance->pagetypepattern = "course-view-*";